For those who are going to setup their own Backpage Proxy, making sure your IPs are from different C class IP ranges is something you should pay special attention to. It isn't a topic that is discussed often, but not having IPs on your server from different C class ranges could be leaving a very big footprint on Backpage.

Their are 4 main ranges for IPs, A B C and D. By using ranges we are able to log network IDs and network activity. Every computer online has an IP which allows it to communicate with other computers online, essentially functioning as an online mailing address or phone number. Disconnecting your computer from the internet and reconnecting typically gives you a different IP, but more often than not it is still within the same IP range. This allows companies and other people to more easily identify your activities as even after changing your IP, it hasn't changed enough so that one could make assumptions or try and track patterns of activity between your new and old IP. It is more than possible that this is exactly what Backpage uses as part of their system to filter out spam. If you wish to remain anonymous to Backpage then C class IP ranges for your proxy server should help you to do so.

As already stated above, using IPs in the same C class IP range may make it possible for Backpage to detect your activity even though you could be using several different accounts (since your new IP isn't varied enough from the old one to make you look like a completely different user). This also applies to proxy servers and is why you should consider getting IPs from as many different C class IP ranges as possible. Generally speaking, IPs on proxy server are within the same range, this is something you should try to avoid. If you wish to post a lot of ads on Backpage then remaining anonymous is very important, so be sure to get a Backpage Proxy with IPs in different C class IP ranges.